MECHANISTIC INSIGHTS INTO THE INTERACTION OF FLUORIDE RESISTANT BACTERIA WITH WHEAT ROOTS TOWARD ENHANCING PLANT PRODUCTIVITY BY ALLEVIATING FLUORIDE STRESS

Wheat productivity is threatened by fluoride contamination in the environment. Fluoride's toxicological effects on plants have been hotly discussed due to lower growth indices, metabolic inhibition, and reduced photosynthetic activity. Fluoride toxicity was reduced in this study by using fluori...

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Bibliographic Details
Published in:Fluoride 2023-07, Vol.56 (3), p.278-292
Main Authors: Zulfiqar, Asma, Fatima, Rameen, Ahmed, Shakil, Saleem, Ammara, Sardar, Rehana, Ahmad, M Numan, Yasin, Nasim Ahmad
Format: Article
Language:English
Subjects:
Antioxidants
Bacteria
Carotenoids
Chlorophyll
Environmental impact
Enzymes
Experiments
Flowers & plants
Fluorides
Microorganisms
Oxidative stress
Physiology
Plant growth
Productivity
Proteins
Seeds
Sodium
Toxicity
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Summary:Wheat productivity is threatened by fluoride contamination in the environment. Fluoride's toxicological effects on plants have been hotly discussed due to lower growth indices, metabolic inhibition, and reduced photosynthetic activity. Fluoride toxicity was reduced in this study by using fluoride-resistant bacterial strains (SS-10a and SS-5a) in the soil. Plants of wheat were treated to varying sodium fluoride (NaF) concentrations of 0 (control), 150, 250, and 350 ppm in a randomized full block design. At 7DAT (Day After Transplantation), fluoride-resistant bacteria were inoculated into the soil of two wheat types, Ujala-15 and Faisalabad 2008. Fluoride stress reduced all growth, biomass, yield, and biochemical parameters significantly, although fluoride-resistant bacteria assisted the plants in overcoming this stress and mitigating the total plant productivity loss. In cellular enzymatic extract from bacterial strain infected plants, total chlorophyll content, carotenoid content, and total soluble proteins all increased. SS-10a and SS-5a inoculated plants demonstrated an increase in ascorbate peroxidase (APX) and catalase (CAT) activity at a low level of NaF, 150 ppm. CAT and APX activity were elevated in plants treated with SS-10a and SS-5a to protect plant cells against oxidative stress at high fluoride levels (250 and 350 ppm). Plant malondialdehyde (MDA) content was also much higher in plants inoculated with bacterial strains than in treated plants, indicating that MDA plays an important role in neutralizing ROS. In both kinds, the efficacy of SS-5a in decreasing fluoride stress was much lower than that of SS-10a. Inoculation with fluoride-resistant bacterial strains can thus be a viable and practicable strategy to decrease fluoride stress under current pollution from an economic and agricultural standpoint.
ISSN:0015-4725
2253-4083